Earticle

초록

영어

Crushed sand is made by crushing the rocks artificially. With a wide shortage of natural river sand all over the region in Korea, demand for crushed sand are becoming increased. However, Informations as to crushed sand are insufficient. In this paper, the actual conditions of crushed sand related to producing and quality variation are investigated. 29 manufacturing company of crushed sand are reviewed. According to results, density of most crushed sand tested exceeded 2.5g/cm3, and absorption ratio meet the requirement of KS except one sample. For grain properties, passing amount of 0.08mm sieve satisfied the requirement of KS except one sample.
Grain distribution of most crushed sand is estimated 54.26%. But 6 crushed sand sample did not meet the requirement of KS.
Fineness modulus and grading are varied from manufacturing region. 18 samples of crushed sand among 29 samples deviated the minimum level of standard grading range by KS. Therefore, improvement of grain properties of crushed sand is urgently needed to manufacture better crushed sand.

목차

Abstract
 1. 서론
 2. 실험계획 및 방법
  2.1 실험대상 및 기간
  2.2 실험방법
 3. 실험결과 및 분석
  3.1 물리적 특성
  3.2 입자 특성
 4. 결론
 참고문헌

저자

• 유승엽 [ Yoo, Seung Yeup | 정회원, 청주대 대학원 석사과정 ]
• 정계원 [ Jeong, Gea Won | 청주대 건축공학부 학사과정 ]
• 주은희 [ Joo, Eun Hi | 청주대 건축공학부 학사과정 ]
• 윤기원 [ Yoon, Gi Won | 정회원, 주성대 건죽과 부교수, 공학박사 ]
• 한천구 [ Han, Cheon Goo | 정회원, 청주대 건축공학부 교수, 공학박사 ]

참고문헌